package src.lab02.test02;

/**
 * Created by 林云志 on 2017/10/13.
 */
public class Circular {
    //1.属性



    //2.行为
    double area(double r){
        double area;
        area = Math.PI*r*r;
        return area;
    }

    double perimeter(double r){
        double perimeter;
        perimeter = 2*Math.PI*r;
        return perimeter;
    }
    //3.构造函数

}
